Architecture specs

Each spec is a design document for a primitive or system in the substrate. Source of truth lives in the substrate repo at docs/design/.

Process

New specs land as PRs in the substrate repo's docs/design/ tree. They go through Senate-style review (informal so far; SPEC-024 framework available when needed). Implementation typically lands as multi-PR series (e.g. SPEC-022 PR 22.1 through PR 22.10).